A Transportation Security Agency worker who pats down members of the flying public was charged with multiple child sex crimes targeting an underage girl yesterday.

The bust outraged privacy and passenger advocates who say it justifies their fears about Logan International Airport’s full-body scanner.

“It’s a huge, huge issue,” said Kate Hinni of FlyersrRights.org. “The TSA needs a complete overhaul . . . If you have a pedophile looking at those naked pictures, they’ve got all your information, it’s a gross violation of their authority. . . . They should make sure none of them is corrupted in any deviant sexual manner.”

Sean Shanahan, 44, of Winthrop was held on $50,000 bail after he was charged with two counts of statutory rape, two counts of enticing a minor and one count of indecent assault and battery. He was arrested yesterday at Massachusetts General Hospital, where he had checked himself in after a suicide threat, prosecutors said.